Home / 985,686.30-1,478,529.45-424,720.80

Finding the Fourth Proportional to 985,686.30, 1,478,529.45 and 424,720.80

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Solution

The fourth proportional to 985,686.30, 1,478,529.45 and 424,720.80 is: 637,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,686.30 : 1,478,529.45 = 424,720.80 : x
  2. Step 2: Convert to fraction form
    985,686.30/1,478,529.45 = 424,720.80/x
  3. Step 3: Cross multiply
    985,686.30x = 1,478,529.45 × 424,720.80
  4. Step 4: Simplify right side
    985,686.30x = 627,962,210,827.56
  5. Step 5: Solve for x
    x = 627,962,210,827.56/985,686.30
  6. Step 6: Final answer
    x = 637,081.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.